Grinding and crushing roll.



E. A. WALL. GRINDING AND GRUSHING ROLL.

APPLIOATION FILED NOV. 8, 1918.

Patented June 2, 1914.

which are driven into the slots a.

ENDS A. WALL, OF SALT LAKE CITY, UTAH.

GRINDING AND GRUSI-IING- ROLL.

Specification of Letters Patent.

Application filed November 8, 1913.

Patented June 2, 1914.

Serial No. 799,939.

7 '0 all whom it may concern Be it known that I, Enos A. WALL, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in" Grinding and Crushing Rolls, of which the following is a specification.

My invention relates to crushing rolls of the type shown in my Patent 1,044,833, November 19, 1912.

The object of the invention is to form these ribbed rolls in longitudinal sections so that they may be the more easily applied to their shafts, as will be hereinafter fully described and pointed out in the claims. This object I accomplish by the construction shown in the accompanying drawing, in which:

Figure 1 is a central longitudinal section through one of my improved rolls and its shaft. Fig. 2 is a transverse section. Fig. 3 is an end elevation.

A designates the roll shaft formed with a longitudinal key slot a, and A is the hub formed with a key slot at. The key a secures the hub to the shaft. The hub A is formed at its ends with annular flanges a provided with bolt apertures a and the face of the hub A at two diametrically opposed points is provided with longitudinally extending slots a slightly wedge-shaped in cross section. The face of the roll is formed in two (or more) sections B, B, and these are provided with longitudinal ribs 6 shaped like the larger ribs in my patent above referred to. The longitudinal edges of the two halves or sections B B are spaced apart and lie against the longitudinal keys 0, The outer edges of the keys G are flush with the outer faces of the shell sections B B. These keys C form ribs which prevent any rotation of the roll shell on the hub portion.

The shell sections B B are provided in the grooves between certain of the ribs with tapered bolt apertures 5 into which are passed tapered bolts 6 the shanks of which pass through the apertures a in the flanges .13 and are secured by nuts or other fastenlngs.

With this construction only the work face of the roll which is formed by the two shells or sections B B is required to be removed when worn out, and it follows that this may be done without removing the shaft or its hub. The cost of the rolls is also very considerably lessened by this construction.

What I claim is:

1. A grinding or crushing roll comprising, a hub, a longitudinally divided roll face or shell of the same length as the hub and formed with spaced ribs extending from end to end thereof, and fastening devices extending through the shell sections between their ribs into the hub.

2. The combination with the shaft provided with a hub having diametrically opposed longitudinal ribs, of a longitudinally divided ribbed shell abutting at the longitudinal edges said hub ribs, and means for securing the shell sections to the hub.

3. A grinding or crushing roll comprising a hub having longitudinal key-ways, keys in said ways forming projecting ribs, a divided shell with its abutting edges lying against said ribs, and means for securing the shell sections to the hub.

In testimony whereof I aflix my signature in presence of two witnesses.

E. A. WALL.

Witnesses:

A. M. PARKINS, Gno. H. Evans.

Copies 01! this patent may be obtained for five cents each, by addressing the Commissioner or Eaten, Washington, D. G. 

